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Marquise|Natural|IGI

0.51ct G SI2 Marquise Natural Diamond

VG • G/SI2 • IGI 815681717

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 815681717

Diamond specifications and retailer prices

From $376 USD
₹35,798 INR
As of October 27, 2026
Save $1,503 USD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,879 USD at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 815681717. Listed at 12 retailers as of October 27, 2026, with prices from $376 to $1,879, a $1,503 spread on the same certified stone. NZ Jewellers lists it at $1,879. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
G
Color
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.6°
Pavilion angle34.8°
OriginNatural
Grading LabIGI
CertificateIGI 815681717
Dimensions9.02 × 4.08 × 2.33 mm
L/W Ratio2.21
Girdle conditionFaceted
Top View
9.02 mm4.08 mm0.51 ctG / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 815681717
Side View
Table 59.0%Crown 39.6°Girdle: MED-THKPavilion 34.8°Culet: NoneDepth 57.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $1,879 USD|Low: $375 USD|High: $1,879 USD|Avg: $661 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 28, 2026
Retailer 10$376 USD
Retailer 5$453 USD
Retailer 13$490 USD
Retailer 4$528 USD
Retailer 11$566 USD
Retailer 8$589 USD
Retailer 7$595 USD
Retailer 9$614 USD
Retailer 3$622 USD
Retailer 2$631 USD
Retailer 6$684 USD
Retailer 12$1,134 USD
NZ Jewellers$1,879 USD

5 data points across 13 retailers

12 retailers$376 USD to $1,879 USD

A
Cheapest Retailer
-
$376 USD
₹35,798 INR
Retailer 2
-
$490 USD
View
Price last confirmed 7 days ago
Retailer 3
-
$528 USD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
$566 USD
View
A
Retailer 5
-
$589 USD
£464 GBP
View
B+
Retailer 6
-
$595 USD
View
A
Retailer 7
-
$614 USD
£484 GBP
View
Retailer 8
-
$622 USD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
$631 USD
View
A
Retailer 10
-
$684 USD
€651 EUR
View
B
Retailer 11
-
$1,134 USD
£893 GBP
View
Most Expensive
C
NZ Jewellers
5fe76a14-e0cf-40a4-8f00-2a032bf2f2f6 · Oct 27
$1,879 USD
View
11 more retailers have this diamond
Prices start from $376 USDSave up to $1,503 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.51ct Marquise
$376 USD